Food SelectionNCT06648226
Food Swaps to Improve the Healthfulness and Reduce the Carbon Footprint of Grocery Purchases
A study testing Health swaps, Climate swaps and Combined health and climate swaps in people with Food Selection and Nutrition, run by Stanford University at 1 site in United States.
Trial summary
The study aims to determine whether viewing health or climate labels (or both) and receiving recommendations for healthier or more climate-friendly swaps (or both) in an online grocery store environment improves the healthfulness and reduces the carbon footprint of consumers' food and beverage purchases compared to… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Food Selection, Nutrition, Food Preferences
- What is being tested?
- Health swaps, Climate swaps and Combined health and climate swaps
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,201 participants
- Where
- 1 siteUnited States
- Study dates
- 7 May 2025to 25 Jun 2025
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Aged 18 years or older
- Reside in the United States
- Able to complete a survey in English
- Have internet access to complete the 3 online study visits
Who cannot join
- Under the age of 18
- Reside outside of the United States
- Unable to complete a survey in English
- Do not have internet access to complete the 3 online study visits
Trial locations and contacts
1 site in 1 country.
United States1 site
Stanford School of Medicine
Palo Alto, California, 94304
About this study
Official title: A Randomized Trial of Food Swaps to Improve the Healthfulness and Reduce the Carbon Footprint of Grocery Purchases
The study aims to determine whether viewing health or climate labels (or both) and receiving recommendations for healthier or more climate-friendly swaps (or both) in an online grocery store environment improves the healthfulness and reduces the carbon footprint of consumers' food and beverage purchases compared to shopping as usual without swap recommendations. The online store will record participants' food selections. Participants will also be asked to complete survey measures.
Read the detailed description
Participants will complete an online between-subjects randomized experiment. The experiment will involve three study visits.
In the first study visit, participants will complete an online grocery store shopping task without intervention. Participants will be given a budget of $50 and asked to shop as they normally would. The store will record participants' food selections. After completing the shopping task, participants will complete an online survey.
Approximately one week later, participants will complete a second study visit with the same instructions. They will be randomized to 1 of 4 conditions (1) health only, 2) climate only, 3) combined health and climate, 4) control. In the health only condition, participants will view labels with nutrition grades and may be directed to swap their selections for healthier items. In the climate only condition, participants will view labels with climate grades and may be directed to swap their selections for more climate-friendly (lower-carbon-footprint) items. In the combined health and climate condition, participants will view labels with health and climate grades and may be directed to swap their selections for healthier or more climate-friendly items. In the control group, participants will not view any labels or swaps. The store will record participants' selections. After completing the shopping task, participants will complete an online survey.
In the third study visit, the participants will maintain their assigned group and will be asked to repeat the same tasks as in the second visit.
- Conditions
- Food Selection, Nutrition, Food Preferences, Dietary Habits, Sustainability, Healthy Diet
- Being tested
- Health swaps, Climate swaps, Combined health and climate swaps, Control
- Keywords
- food choices, climate, dietary substitutions, diet
- Medical subject headings
- Food Preferences, Feeding Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Health swapsBehavioural
Participants will view "health grade" labels on all products in the online grocery store indicating their healthfulness as estimated by United Kingdom Ofcom Nutrient Profiling Model scores. The health score labels will mimic Nutri-Score labels, a labeling system used in some European countries, showing a color-coded grade of "A" (green) through "F" (red) on each product. Products with "A" and "B" labels will meet the United Kingdom's cutoff for products that can be marketed to children and "C", "D" and "F" labels products are less healthy than this cutoff (based on tertiles of Ofcom scores within each food group). When participants attempt to add a less healthy product to their cart (e.g., "C," "D" or "F" health label), the store will automatically suggest a healthier product from the same category (e.g., with a "A" or "B" health label).
Climate swapsBehavioural
Participants will view "climate grade" labels on all products indicating their climate impact. The climate impact is calculated as the greenhouse gas emissions associated with producing the product in carbon dioxide equivalents (CO2-eq) per 100g (i.e., "carbon footprint"). Labels will be applied based on quintiles of carbon footprints in each food group. When participants attempt to add a high-climate-impact product to their cart (e.g., with a "C," "D," or "F" climate label), the store will automatically offer them swaps to more climate-friendly products (e.g., with a "A" or "B" climate label).
Combined health and climate swapsBehavioural
Participants will view both the health and climate grade labels on all products in the online grocery store. When participants attempt to select a product with a "C," "D," or "F" label on either dimension to their cart, the store will automatically offer them swaps to products that offer improvement over the original food on at least 1 dimension (health or climate-friendliness) and were at least as good or better on the other dimension, with the additional guardrail that the store never suggests products with a "C," "D" or "F" label on either dimension.
ControlBehavioural
Participants will not view any extra labels or be offered any swaps in the online grocery store.
| Study group | Role | What they receive |
|---|---|---|
| Health swaps | Experimental | Labels will be "nutrition grades" for products and replacement swap suggestions will be for items with a better nutrition grade. Receives: Behavioral: Health swaps |
| Climate swaps | Experimental | Labels will be "climate grades" for products and replacement swap suggestions will be for items with a better climate grade. Receives: Behavioral: Climate swaps |
| Combined health and climate swaps | Experimental | Labels will be "nutrition grades" and "climate grades" for products and replacement swap suggestions will be for items that are better than originally selected products on at least one dimension (nutrition grade or climate grade) and not worse than originally selected products on either dimension. Receives: Behavioral: Combined health and climate swaps |
| Control | Active comparator | No labels or swaps. Receives: Behavioral: Control |
What is being measured
The primary outcome is the main question the study is designed to answer.
Healthfulness of Product Selection
The study will asses healthfulness of participants' selections as the average Ofcom Nutrient Profiling Model score of the products the participants select in the shopping task. The score ranges from 0 to 100, where higher scores are healthier. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Carbon Footprint of Participants' Grocery Store Selections
The study will assess the carbon footprint of participants' selections, operationalized as the average carbon footprint (in CO2-equivalents) of the products the participants select in the shopping task. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, the non-missing value was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Secondary outcomes (16)
Calorie Density of Participants' Grocery Selections
The study will assess the average calorie density of participants' grocery selections, calculated as the average kcal per 100g of the selected products. Higher values will indicate higher calorie density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Sugar Density of Participants' Grocery Selections
The study will assess the average sugar density of participants' grocery selections, calculated as the average grams of sugar per 100g of the selected products. Higher values will indicate higher sugar density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Sodium Density of Participants' Grocery Selections
The study will assess the average sodium density of participants' grocery selections, calculated as the average milligrams of sodium per 100g of the selected products. Higher values will indicate higher sodium density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Saturated Fat Density of Participants' Grocery Selections
The study will assess the average saturated fat density of participants' grocery selections, calculated as the average grams of saturated fat per 100g of the selected products. Higher values will indicate higher saturated fat density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Fiber Density of Participants' Grocery Selections
The study will assess the average fiber density of participants' grocery selections, calculated as the average grams of fiber per 100g of the selected products. Higher values will indicate higher fiber density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Protein Density of Participants' Grocery Selections
The study will assess the average protein density of participants' grocery selections, calculated as the average grams of protein per 100g of the selected products. Higher values will indicate higher protein density. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Total Spending on Participants' Grocery Selections
The study will assess the total amount participants spent on their grocery selections in United States dollars. Higher values will indicate greater spending. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Health
The study will assess thinking about health using 1 item: "We are interested in how you selected products while you were grocery shopping. When you selected foods, how much did you think about each of the following characteristics? ... health." Response options range from "Not at all" (1) to "A great deal" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Climate Impact
The study will assess thinking about climate impact using 1 item: "We are interested in how you selected products while you were grocery shopping. When you selected foods, how much did you think about each of the following characteristics? ... climate impact." Response options range from "Not at all" (1) to "A great deal" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Taste
The study will assess thinking about taste using 1 item: "We are interested in how you selected products while you were grocery shopping. When you selected foods, how much did you think about each of the following characteristics? ... taste." Response options range from "Not at all" (1) to "A great deal" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Negative Emotional Reactions While Shopping
The study will assess negative emotional reactions using 3 items: "While you were shopping, how much did you feel…" "worried", "guilty," "ashamed"? Response options range from "Not at all" (1) to "Extremely" (5). The investigators will average the 3 items; higher average scores indicate stronger negative emotional reactions. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Positive Emotional Reactions While Shopping
The study will assess positive emotional reactions using 3 items: "While you were shopping, how much did you feel…" "inspired", "proud," "reassured"? Response options range from "Not at all" (1) to "Extremely" (5). The investigators will average the 3 items; higher average scores indicate stronger positive emotional reactions. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Injunctive Norms to Buy Healthy Foods
The study will assess injunctive norms to buy healthy foods with 1 item: "People who are important to me think I should buy healthy foods." Response options range from "Strongly disagree" (1) to "Strongly agree" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Descriptive Norms to Buy Healthy Foods
The study will assess descriptive norms to buy healthy foods with 1 item: "Most shoppers buy healthy foods when they are shopping for groceries." Response options range from "Strongly disagree" (1) to "Strongly agree" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Injunctive Norms to Buy Foods With Low Climate Impact
The study will assess injunctive norms to buy foods with low climate impact with 1 item: "People who are important to me think I should buy foods with low climate impact." Response options range from "Strongly disagree" (1) to "Strongly agree" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Descriptive Norms to Buy Foods With Low Climate Impact
The study will assess descriptive norms to buy foods with lower climate impact with 1 item: "Most shoppers buy foods with low climate impact when they are shopping for groceries." Response options range from "Strongly disagree" (1) to "Strongly agree" (5). Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Measured: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Oct 2024
- Study start7 May 2025
- Primary completion25 Jun 2025
- Study completion25 Jun 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Food SelectionStudies of the same condition, open and under way.
- More trials run by Stanford UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 1,201 participants (actual)
Sponsor and investigators
- Lead sponsor
- Stanford University
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Principal investigator, Anna Grummon, Stanford University
- Investigators
- Anna H. Grummon, PhD, Principal investigator, Stanford School of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06648226
- Sponsor's protocol ID
- 76925
- Other IDs
- K01HL158608
- Status last verified
- May 2026
- First submitted
- 16 Oct 2024
- Last updated
- 24 Jun 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: The investigators will post the data to a public repository.
Study at a glance
From the registry record, last updated by the sponsor on 24 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Randomized Trial of Food Swaps to Improve the Healthfulness and Reduce the Carbon Footprint of Grocery Purchases
- ClinicalTrials.gov ID
- NCT06648226
- Acronym / sponsor ID
- 76925
- Conditions
- Food Selection, Nutrition, Food Preferences, Dietary Habits, Sustainability, Healthy Diet
- Keywords
- food choices, climate, dietary substitutions, diet
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 1,201 participants (actual)
- Lead sponsor
- Stanford UniversityUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- 7 May 2025 (actual)
- Primary completion
- 25 Jun 2025 (actual)
- Study completion
- 25 Jun 2025 (actual)
- First posted
- 18 Oct 2024 (actual)
- Results
- Posted 1 Jun 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The study aims to determine whether viewing health or climate labels (or both) and receiving recommendations for healthier or more climate-friendly swaps (or both) in an online grocery store environment improves the healthfulness and reduces the carbon footprint of consumers' food and beverage purchases compared to shopping as usual without swap recommendations. The online store will record participants' food selections. Participants will also be asked to complete survey measures.
Detailed description
Participants will complete an online between-subjects randomized experiment. The experiment will involve three study visits.
In the first study visit, participants will complete an online grocery store shopping task without intervention. Participants will be given a budget of $50 and asked to shop as they normally would. The store will record participants' food selections. After completing the shopping task, participants will complete an online survey.
Approximately one week later, participants will complete a second study visit with the same instructions. They will be randomized to 1 of 4 conditions (1) health only, 2) climate only, 3) combined health and climate, 4) control. In the health only condition, participants will view labels with nutrition grades and may be directed to swap their selections for healthier items. In the climate only condition, participants will view labels with climate grades and may be directed to swap their selections for more climate-friendly (lower-carbon-footprint) items. In the combined health and climate condition, participants will view labels with health and climate grades and may be directed to swap their selections for healthier or more climate-friendly items. In the control group, participants will not view any labels or swaps. The store will record participants' selections. After completing the shopping task, participants will complete an online survey.
In the third study visit, the participants will maintain their assigned group and will be asked to repeat the same tasks as in the second visit.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Health swaps | Experimental | Behavioral: Health swapsLabels will be "nutrition grades" for products and replacement swap suggestions will be for items with a better nutrition grade. |
| Climate swaps | Experimental | Behavioral: Climate swapsLabels will be "climate grades" for products and replacement swap suggestions will be for items with a better climate grade. |
| Combined health and climate swaps | Experimental | Behavioral: Combined health and climate swapsLabels will be "nutrition grades" and "climate grades" for products and replacement swap suggestions will be for items that are better than originally selected products on at least one dimension (nutrition grade or climate grade) and not worse than originally selected products on either dimension. |
| Control | Active comparator | Behavioral: ControlNo labels or swaps. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Aged 18 years or older
- Reside in the United States
- Able to complete a survey in English
- Have internet access to complete the 3 online study visits
Key exclusion criteria (4 listed)
- Under the age of 18
- Reside outside of the United States
- Unable to complete a survey in English
- Do not have internet access to complete the 3 online study visits
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Health swapsParticipants will view "health grade" labels on all products in the online grocery store indicating their healthfulness as estimated by United Kingdom Ofcom Nutrient Profiling Model scores. The health score labels will mimic Nutri-Score labels, a labeling system used in some European countries, showing a color-coded grade of "A" (green) through "F" (red) on each product. Products with "A" and "B" labels will meet the United Kingdom's cutoff for products that can be marketed to children and "C", "D" and "F" labels products are less healthy than this cutoff (based on tertiles of Ofcom scores within each food group). When participants attempt to add a less healthy product to their cart (e.g., "C," "D" or "F" health label), the store will automatically suggest a healthier product from the same category (e.g., with a "A" or "B" health label). | Behavioural | Health swaps |
| Climate swapsParticipants will view "climate grade" labels on all products indicating their climate impact. The climate impact is calculated as the greenhouse gas emissions associated with producing the product in carbon dioxide equivalents (CO2-eq) per 100g (i.e., "carbon footprint"). Labels will be applied based on quintiles of carbon footprints in each food group. When participants attempt to add a high-climate-impact product to their cart (e.g., with a "C," "D," or "F" climate label), the store will automatically offer them swaps to more climate-friendly products (e.g., with a "A" or "B" climate label). | Behavioural | Climate swaps |
| Combined health and climate swapsParticipants will view both the health and climate grade labels on all products in the online grocery store. When participants attempt to select a product with a "C," "D," or "F" label on either dimension to their cart, the store will automatically offer them swaps to products that offer improvement over the original food on at least 1 dimension (health or climate-friendliness) and were at least as good or better on the other dimension, with the additional guardrail that the store never suggests products with a "C," "D" or "F" label on either dimension. | Behavioural | Combined health and climate swaps |
| ControlParticipants will not view any extra labels or be offered any swaps in the online grocery store. | Behavioural | Control |
Primary outcome
Healthfulness of Product Selection
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
The study will asses healthfulness of participants' selections as the average Ofcom Nutrient Profiling Model score of the products the participants select in the shopping task. The score ranges from 0 to 100, where higher scores are healthier. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, data from the non-missing visit was used.
Carbon Footprint of Participants' Grocery Store Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
The study will assess the carbon footprint of participants' selections, operationalized as the average carbon footprint (in CO2-equivalents) of the products the participants select in the shopping task. Outcome values were calculated as each participant's mean across visits 2 and 3. If participants had missing data at one of these visits, the non-missing value was used.
16 secondary outcomes
Calorie Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Sugar Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Sodium Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Saturated Fat Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Fiber Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Protein Density of Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Total Spending on Participants' Grocery Selections
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Health
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Climate Impact
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Thinking About Taste
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Negative Emotional Reactions While Shopping
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Positive Emotional Reactions While Shopping
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Injunctive Norms to Buy Healthy Foods
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Descriptive Norms to Buy Healthy Foods
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Injunctive Norms to Buy Foods With Low Climate Impact
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Descriptive Norms to Buy Foods With Low Climate Impact
Time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Jun 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: Yes. The investigators will post the data to a public repository.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Anna H. Grummon, PhD principal investigator
Stanford School of Medicine
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Health swaps, Climate swaps and Combined health and climate swaps in people with Food Selection and Nutrition, run by Stanford University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 24 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 1 Jun 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Healthfulness of Product Selection (time frame: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Jun 2026.